<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<header>
			<h2>这是头部</h2>
		</header>
		<section>
			<h2>中间</h2>
		</section>
		<footer>
			<h2>尾部</h2>
		</footer>
	</body>
</html>
